The surface roughness of the gear hobbing gear exceeds the requirement and the reason for the error of the tooth thickness

The surface roughness of the gear hobbing gear exceeds the requirement and the reasons for the tooth thickness error are explained as follows, for reference.

4. The XNUMX main reasons why the surface roughness of gear teeth exceeds the requirements

1. The rigidity and material manufacturability of gear blanks.

2. Hob manufacturing errors, including hob sharpening quality, radial runout, and axial runout errors.

3. The accuracy and rigidity of the machine tool and the fixture used.

4. Selection of cutting amount and coolant selection during hobbing.

4. The XNUMX main causes of tooth thickness error

1. Hob design and manufacturing error

2. InMachining gearAt this time, due to the wear of the hob, the tooth thickness will become fatter or thinner in order to meet the requirements of other dimensions of the tooth profile.

For example, when hobbing a modified cycloid gear, the outer diameter size is large or small, which will affect the tooth thickness size.

3. When adjusting the machine tool, the center position of the tool is offset.

4. The movement of the tool shaft or end face beating.